Armchair



FIG. 1 is a front perspective view of an armchair;

FIG. 2 is a front view of the armchair;

FIG. 3 is a rear view of the armchair;

FIG. 4 is a right side view of the armchair;

FIG. 5 is a left side view of the armchair;

FIG. 6 is a top view of the armchair;

FIG. 7 is a bottom view of the armchair;

FIG. 8 is a bottom perspective view of the armchair; and,

FIG. 9 is a rear perspective view of the armchair.

The broken lines shown throughout the views represent the portions of the armchair which form no part of the claimed design. 

CLAIM The ornamental design for an armchair, as shown and described. 